I had twice a missing monster (not teleported in) while attempting to finish the level under uv-max.
is this common or I was just unlucky?
the monster is an hell knight, it should be the southern-west-most one.

I thought it could be a specter on the way to the switches, since they teleport very fast and close to the player, but this looks strange to me

sadly, i was on holidays when the public beta was opened and now im playing map by map ;(
so far not even a single demo was published for the level btw... an hotfix to change only that, won't harm any other demo I guess?

Of course, but I've been advised not to release one by virtue of not creating another 2002ADO with its flurry of different versions. Still, though, all it'll take is changing a linedef's tag, which I can do without rebuilding nodes. Same with the coop-only bug on MAP29, which, despite hawkwind's suggestion, can be fixed solely by changing two linedefs' types (from the erroneous "scroll floor, move things" type to the intended teleport action). I think this will depend on whether any more critical bugs are found. We'll see.